1. An experiment studies the effects
of an experimental drug on the number of offspring a mother mouse has. 10 female
mice are given the drug and then impregnated. The number of mice in their litters
is compared to the litters of mice that did not take the drug.

Number of Babies in Litter

Group A
(drug)

5

6

4

8

5

2

7

12

12

8

Group B
(control)

4

4

6

6

5

6

4

7

5

3

Based on the data, what would you
conclude about the drug? How do you figure out whether the drug worked?

Average for group A = 7 | Average for group B = 5

Based on averages, the drug does increase litter size.

2. A type of feed claims to boost
the growth rate of cows. The feed is tested on two twin newborn cows. Bessie
receives the experimental feed, and Bertha receives regular corn feed. Their
weights are recorded below.

Month

April

May

June

July

Aug

Bessie

150 lbs

210 lbs

260 lbs

320 lbs

400 lbs

Bertha

150 lbs

250 lbs

290 lbs

340 lbs

400 lbs

Graph the data below. Use a dotted
line for Bessie and a straight line for Bertha.
Make sure you label the X and Y Axis of the graph

Both cows ended at the same weight, but did the experimental feed change the
way they gained weight at all? Describe your conclusions about the experimental
feed.

The both started at the same weight,but Bertha grew at a slightly faster rate.

Why is it important that the experiment used twin cows? Twins are used to removed genetic variables. Some cows just grow faster.

3.a.
According to the graph, which town grew the fastest? Riverton

b. Which town declined in population? Westfield

c. Which town had the smallest change in population? Ashenvale

d. What is the population of Woodland
in 2000? 1200

4.
a. According to the graph, which group of organisms has the most number of species? Insects

b. What is the total percentage for
all invertebrates? 75%

c. Approximately what percentage are vertebrates? 5-10%

5. The population of tiger sharks
off the coast of Florida was recorded over several months. Graph the tiger shark populations below.

The number of nurse sharks was also
recorded for this time period; though the person recorded the number was not
as reliable as the person recording tiger shark numbers. The following data
was taken on nurse sharks. Use a different color to graph the nurse shark population
on the graph above.